linux-kernel - [PATCH] usb: stkwebcam: update the reference count of the usb device structure

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Date:   Sat, 24 Jul 2021 20:58:31 +0100
From:   Salah Triki <salah.triki@...il.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        gregkh@...uxfoundation.org
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] usb: stkwebcam: update the reference count of the usb device
 structure

Use usb_get_dev() and usb_put_dev() in order to update the reference
count of the usb device structure.

Signed-off-by: Salah Triki <salah.triki@...il.com>
---
 drivers/media/usb/stkwebcam/stk-webcam.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/usb/stkwebcam/stk-webcam.c b/drivers/media/usb/stkwebcam/stk-webcam.c
index a45d464427c4..3b14679829ed 100644
--- a/drivers/media/usb/stkwebcam/stk-webcam.c
+++ b/drivers/media/usb/stkwebcam/stk-webcam.c
@@ -1309,7 +1309,7 @@ static int stk_camera_probe(struct usb_interface *interface,
 	init_waitqueue_head(&dev->wait_frame);
 	dev->first_init = 1; /* webcam LED management */
 
-	dev->udev = udev;
+	dev->udev = usb_get_dev(udev);
 	dev->interface = interface;
 	usb_get_intf(interface);
 
@@ -1376,6 +1376,7 @@ static void stk_camera_disconnect(struct usb_interface *interface)
 
 	usb_set_intfdata(interface, NULL);
 	unset_present(dev);
+	usb_put_dev(interface_to_usbdev(interface));
 
 	wake_up_interruptible(&dev->wait_frame);
 
-- 
2.25.1